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Title

Quantum nuclear motion of helium and molecular nitrogen clusters in carbon nanotubes

AuthorsHauser, Andreas W.; Mitrushchenkov, Alexander O. ; Lara Castells, María Pilar de
Issue Date31-Jan-2017
PublisherAmerican Chemical Society
CitationJournal of Physical Chemistry C 121(7): 3807–3821 (2017)
AbstractWe study the quantum nuclear motion of N 4He atoms or N N2 molecules (N < 4) confined in carbon nanotubes using an ad hoc-developed nuclear wave function-based approach. Density functional theory (DFT)-based symmetry-adapted perturbation theory is used to derive parameters for a new pairwise potential model describing the gas adsorption to carbon materials. The predicted nuclear motion of He atoms inside a confining potential is directly compared to probability densities obtained by orbital-free He-DFT theory. The interaction of small clusters of adsorbates is also studied via a combination of both the discrete atomic and the continuous density approaches. Our results agree well with previously reported experimental and theoretical studies and provide new physical insights into the very different quantum confinement effects depending on the diameter of the carbon nanotubes and the impact of quantum phenomena on the gas storage capabilities at low temperatures. ACS AuthorChoice
Description15 págs.; 9 figs.; 3 tabs. This is an open access article published under an ACS AuthorChoice License, which permits copying and redistribution of the article or any adaptations for non-commercial purposes.
Publisher version (URL)http://doi.org/10.1021/acs.jpcc.6b12959
URIhttp://hdl.handle.net/10261/145953
DOI10.1021/acs.jpcc.6b12959
ISSN1932-7447
E-ISSN1932-7455
Appears in Collections:(CFMAC-IFF) Artículos
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